Gorgeous !
Fantastic shot !
best regards, gustavo.

----- Original Message -----
From: <Comet-Images@yahoogroups.com>
To: <Comet-Images@yahoogroups.com>
Sent: Sunday, November 22, 2009 6:07 AM
Subject: [Comet-Images] New file uploaded to Comet-Images


>
> Hello,
>
> This email message is a notification to let you know that
> a file has been uploaded to the Files area of the Comet-Images
> group.
>
>  File        : /michael jaeger/2007Q320091122UT420s4x240se.jpg
>  Uploaded by : schmidtcamera2500 <michaeljaeger@...>
>  Description : 2007Q3 + M88   nov. 22     4.20  UT  4x240sec  10"/3.8
> M.Jäger
>
> You can access this file at the URL:
>
http://groups.yahoo.com/group/Comet-Images/files/michael%20jaeger/2007Q320091122\
UT420s4x240se.jpg
>
> To learn more about file sharing for your group, please visit:
>
http://help.yahoo.com/l/us/yahoo/groups/original/members/forms/general.htmlfiles
>
> Regards,
>
> schmidtcamera2500 <michaeljaeger@...>
>
>
>
>
>
>
> ------------------------------------
>
> Yahoo! Groups Links
>
>
>

Hello,

This email message is a notification to let you know that
a file has been uploaded to the Files area of the Comet-Images
group.

   File        : /CAST Italy/C2007Q3_091122.jpg
   Uploaded by : astroligu2002 <rolando.ligustri@...>
   Description : comet C/2007 Q3 near M88, color image

You can access this file at the URL:
http://groups.yahoo.com/group/Comet-Images/files/CAST%20Italy/C2007Q3_091122.jpg

To learn more about file sharing for your group, please visit:
http://help.yahoo.com/l/us/yahoo/groups/original/members/forms/general.htmlfiles

Regards,

astroligu2002 <rolando.ligustri@...>

Rolando, a splendid image from a splendid italian friend ...

Best wishes,

Juan Jose Gonzalez

----------------------------------------------------------------

Rolando Ligustri wrote in Comet-Images:

> Hello,
>
> This email message is a notification to let you know that
> a file has been uploaded to the Files area of the Comet-Images
> group.
>
>   File        : /CAST Italy/C2007Q3_091122.jpg
>   Uploaded by : astroligu2002 <rolando.ligustri@...>
>   Description : comet C/2007 Q3 near M88, color image
>
> You can access this file at the URL:
>
http://groups.yahoo.com/group/Comet-Images/files/CAST%20Italy/C2007Q3_091122.jpg
>
> To learn more about file sharing for your group, please visit:
>
http://help.yahoo.com/l/us/yahoo/groups/original/members/forms/general.htmlfiles
>
> Regards,
>
> astroligu2002 <rolando.ligustri@...>
>

Hello
http://fototime.com/EE1FC1F9CD07CB1/orig.jpg
Thanks, Mike H.

Mike,

That's an exceptionally pretty image of comet  C/2007 Q3 (Siding Spring) and NGC
4501 or M88)






________________________________
From: tricks46 <tricks46@...>
To: Comet-Images@yahoogroups.com
Sent: Sun, November 22, 2009 10:02:54 AM
Subject: [Comet-Images] C/2007 Q3 - 2009/11/22


Hello
http://fototime. com/EE1FC1F9CD07 CB1/orig. jpg
Thanks, Mike H.




[Non-text portions of this message have been removed]

This morning's email is very exciting with all these wonderful images of C/2007
Q3 and M88

Thanks to all who are posting.
Very fine imaging.




________________________________
From: Gustavo Muler <gustavomuler@...>
To: Comet-Images@yahoogroups.com
Sent: Sun, November 22, 2009 4:40:36 AM
Subject: Re: [Comet-Images] New file uploaded to Comet-Images


Gorgeous !
Fantastic shot !
best regards, gustavo.

----- Original Message -----
From: <Comet-Images@ yahoogroups. com>
To: <Comet-Images@ yahoogroups. com>
Sent: Sunday, November 22, 2009 6:07 AM
Subject: [Comet-Images] New file uploaded to Comet-Images

>
> Hello,
>
> This email message is a notification to let you know that
> a file has been uploaded to the Files area of the Comet-Images
> group.
>
>  File        : /michael jaeger/2007Q3200911 22UT420s4x240se. jpg
>  Uploaded by : schmidtcamera2500 <michaeljaeger@ gmx.at>
>  Description : 2007Q3 + M88   nov. 22     4.20  UT  4x240sec  10"/3.8
> M.Jäger
>
> You can access this file at the URL:
> http://groups. yahoo.com/ group/Comet- Images/files/ michael%20jaeger
/2007Q320091122U T420s4x240se. jpg
>
> To learn more about file sharing for your group, please visit:
> http://help. yahoo.com/ l/us/yahoo/ groups/original/ members/forms/
general.htmlfile s
>
> Regards,
>
> schmidtcamera2500 <michaeljaeger@ gmx.at>
>
>
>
>
>
>
> ------------ --------- --------- ------
>
> Yahoo! Groups Links
>
>
>




[Non-text portions of this message have been removed]

Yhanks Charles.  I have a lot of information but the gradients are really bad to
the point of keeping me from true color shots.  May not ever get them correct
with my processing knowledge.
Mike

--- In Comet-Images@yahoogroups.com, Charles Bell <charbell@...> wrote:
>
> Mike,
>
> That's an exceptionally pretty image of comet  C/2007 Q3 (Siding Spring) and
NGC 4501 or M88)
>
>
>
>
>
>
> ________________________________
> From: tricks46 <tricks46@...>
> To: Comet-Images@yahoogroups.com
> Sent: Sun, November 22, 2009 10:02:54 AM
> Subject: [Comet-Images] C/2007 Q3 - 2009/11/22
>
>
> Hello
> http://fototime. com/EE1FC1F9CD07 CB1/orig. jpg
> Thanks, Mike H.
>
>
>
>
> [Non-text portions of this message have been removed]
>

> Hello
> http://fototime.com/EE1FC1F9CD07CB1/orig.jpg
> Thanks, Mike H.

great photo!
Rolando

> Rolando, a splendid image from a splendid italian friend ...
> Best wishes,
> Juan Jose Gonzalez

Thanks Juan! :-)))

Rolando

I sincerely subscribe your words, Charles.

Juan Jose Gonzalez

-----------------------------------------------

Charles Bell wrote:

> This morning's email is very exciting with all these wonderful images of
C/2007 Q3 and M88
>
> Thanks to all who are posting.
> Very fine imaging.
>
>

I'm excited too about yet another very active comet, C/2007 Q3,  further to the
east in the morning sky.

There is 81P, P/2009 Q4 getting more active daily.


  217P still looking very nice.

All the good ones are bunched up in the morning sky. Makes the last hour of dark
rather busy.


  Twitter:  http://twitter.com/cbellh47
Flickr: http://www.flickr.com/photos/cbellh47/
Facebook: http://www.facebook.com/cbellh47




________________________________
From: tricks46 <tricks46@...>
To: Comet-Images@yahoogroups.com
Sent: Sun, November 22, 2009 11:59:49 AM
Subject: [Comet-Images] Re: C/2007 Q3 - 2009/11/22


Yhanks Charles.  I have a lot of information but the gradients are really bad to
the point of keeping me from true color shots.  May not ever get them correct
with my processing knowledge.
Mike

--- In Comet-Images@ yahoogroups. com, Charles Bell <charbell@.. .> wrote:
>
> Mike,
>
> That's an exceptionally pretty image of comet  C/2007 Q3 (Siding Spring) and
NGC 4501 or M88)
>
>
>
>
>
>
> ____________ _________ _________ __
> From: tricks46 <tricks46@.. .>
> To: Comet-Images@ yahoogroups. com
> Sent: Sun, November 22, 2009 10:02:54 AM
> Subject: [Comet-Images] C/2007 Q3 - 2009/11/22
>
>
> Hello
> http://fototime. com/EE1FC1F9CD07 CB1/orig. jpg
> Thanks, Mike H.
>
>
>
>
> [Non-text portions of this message have been removed]
>

HA HA!!   That would be "Thanks"

--- In Comet-Images@yahoogroups.com, "tricks46" <tricks46@...> wrote:
>
> Yhanks Charles.  I have a lot of information but the gradients are really bad
to the point of keeping me from true color shots.  May not ever get them correct
with my processing knowledge.
> Mike
>
> --- In Comet-Images@yahoogroups.com, Charles Bell <charbell@> wrote:
> >
> > Mike,
> >
> > That's an exceptionally pretty image of comet  C/2007 Q3 (Siding Spring) and
NGC 4501 or M88)
> >
> >
> >
> >
> >
> >
> > ________________________________
> > From: tricks46 <tricks46@>
> > To: Comet-Images@yahoogroups.com
> > Sent: Sun, November 22, 2009 10:02:54 AM
> > Subject: [Comet-Images] C/2007 Q3 - 2009/11/22
> >
> >
> > Hello
> > http://fototime. com/EE1FC1F9CD07 CB1/orig. jpg
> > Thanks, Mike H.
> >
> >
> >
> >
> > [Non-text portions of this message have been removed]
> >
>

Hi

Thank you for all compliments.

The image i posted thi morning was a first try.

That i have done with the image now.
1. To make the stars a little bit smaller I used Fitswork
2. For DDP i used Astro Arts
3. To remove vignetting i go back to Fitswork

Now I had finished and will post the whole image new.

Michael


--- In Comet-Images@yahoogroups.com, "Gustavo Muler" <gustavomuler@...> wrote:
>
> Gorgeous !
> Fantastic shot !
> best regards, gustavo.
>
> ----- Original Message -----
> From: <Comet-Images@yahoogroups.com>
> To: <Comet-Images@yahoogroups.com>
> Sent: Sunday, November 22, 2009 6:07 AM
> Subject: [Comet-Images] New file uploaded to Comet-Images
>
>
> >
> > Hello,
> >
> > This email message is a notification to let you know that
> > a file has been uploaded to the Files area of the Comet-Images
> > group.
> >
> >  File        : /michael jaeger/2007Q320091122UT420s4x240se.jpg
> >  Uploaded by : schmidtcamera2500 <michaeljaeger@...>
> >  Description : 2007Q3 + M88   nov. 22     4.20  UT  4x240sec  10"/3.8
> > M.Jäger
> >
> > You can access this file at the URL:
> >
http://groups.yahoo.com/group/Comet-Images/files/michael%20jaeger/2007Q320091122\
UT420s4x240se.jpg
> >
> > To learn more about file sharing for your group, please visit:
> >
http://help.yahoo.com/l/us/yahoo/groups/original/members/forms/general.htmlfiles
> >
> > Regards,
> >
> > schmidtcamera2500 <michaeljaeger@...>
> >
> >
> >
> >
> >
> >
> > ------------------------------------
> >
> > Yahoo! Groups Links
> >
> >
> >
>

Hello,

This email message is a notification to let you know that
a file has been uploaded to the Files area of the Comet-Images
group.

   File        : /michael jaeger/2007Q320091122UT420s4x240ne.jpg
   Uploaded by : schmidtcamera2500 <michaeljaeger@...>
   Description : 2007 Q3 + M88 nov 22 New  M.Jäger

You can access this file at the URL:
http://groups.yahoo.com/group/Comet-Images/files/michael%20jaeger/2007Q320091122\
UT420s4x240ne.jpg

To learn more about file sharing for your group, please visit:
http://help.yahoo.com/l/us/yahoo/groups/original/members/forms/general.htmlfiles

Regards,

schmidtcamera2500 <michaeljaeger@...>

Hello

http://fototime.com/81AE70D1BAD3E77/standard.jpg

http://fototime.com/81AE70D1BAD3E77/orig.jpg

Thanks, Mike H.

Brutal.
fantastic.
best regards, gustavo.

----- Original Message -----
From: <Comet-Images@yahoogroups.com>
To: <Comet-Images@yahoogroups.com>
Sent: Sunday, November 22, 2009 10:55 PM
Subject: [Comet-Images] New file uploaded to Comet-Images


>
> Hello,
>
> This email message is a notification to let you know that
> a file has been uploaded to the Files area of the Comet-Images
> group.
>
>  File        : /michael jaeger/2007Q320091122UT420s4x240ne.jpg
>  Uploaded by : schmidtcamera2500 <michaeljaeger@...>
>  Description : 2007 Q3 + M88 nov 22 New  M.Jäger
>
> You can access this file at the URL:
>
http://groups.yahoo.com/group/Comet-Images/files/michael%20jaeger/2007Q320091122\
UT420s4x240ne.jpg
>
> To learn more about file sharing for your group, please visit:
>
http://help.yahoo.com/l/us/yahoo/groups/original/members/forms/general.htmlfiles
>
> Regards,
>
> schmidtcamera2500 <michaeljaeger@...>
>
>
>
>
>
>
> ------------------------------------
>
> Yahoo! Groups Links
>
>
>

Extremely great Capture....
Freddy

--- In Comet-Images@yahoogroups.com, "tricks46" <tricks46@...> wrote:
>
> Hello
>
> http://fototime.com/81AE70D1BAD3E77/standard.jpg
>
> http://fototime.com/81AE70D1BAD3E77/orig.jpg
>
> Thanks, Mike H.
>

Hello,

This email message is a notification to let you know that
a file has been uploaded to the Files area of the Comet-Images
group.

   File        : /michael jaeger/29P20091122UT159s4x210.jpg
   Uploaded by : schmidtcamera2500 <michaeljaeger@...>
   Description : 29P  2009 nov22   1.59 UT  4x210 sec  10"/3.8  Sigma 6303  field
90x60'  M.Jäger

You can access this file at the URL:
http://groups.yahoo.com/group/Comet-Images/files/michael%20jaeger/29P20091122UT1\
59s4x210.jpg

To learn more about file sharing for your group, please visit:
http://help.yahoo.com/l/us/yahoo/groups/original/members/forms/general.htmlfiles

Regards,

schmidtcamera2500 <michaeljaeger@...>

Nice image Michael!  Is the 6303 a new chip for you?
Mike H.

--- In Comet-Images@yahoogroups.com, Comet-Images@yahoogroups.com wrote:
>
>
> Hello,
>
> This email message is a notification to let you know that
> a file has been uploaded to the Files area of the Comet-Images
> group.
>
>   File        : /michael jaeger/29P20091122UT159s4x210.jpg
>   Uploaded by : schmidtcamera2500 <michaeljaeger@...>
>   Description : 29P  2009 nov22   1.59 UT  4x210 sec  10"/3.8  Sigma 6303 
field 90x60'  M.Jäger
>
> You can access this file at the URL:
>
http://groups.yahoo.com/group/Comet-Images/files/michael%20jaeger/29P20091122UT1\
59s4x210.jpg
>
> To learn more about file sharing for your group, please visit:
>
http://help.yahoo.com/l/us/yahoo/groups/original/members/forms/general.htmlfiles
>
> Regards,
>
> schmidtcamera2500 <michaeljaeger@...>
>

Mike

I bought this camera two years ago.
Next i will post a image of comet 2009Q4

Michael


   ----- Original Message -----
   From: tricks46
   To: Comet-Images@yahoogroups.com
   Sent: Monday, November 23, 2009 4:18 PM
   Subject: [Comet-Images] Re: New file uploaded to Comet-Images



   Nice image Michael! Is the 6303 a new chip for you?
   Mike H.

   --- In Comet-Images@yahoogroups.com, Comet-Images@yahoogroups.com wrote:
   >
   >
   > Hello,
   >
   > This email message is a notification to let you know that
   > a file has been uploaded to the Files area of the Comet-Images
   > group.
   >
   > File : /michael jaeger/29P20091122UT159s4x210.jpg
   > Uploaded by : schmidtcamera2500 <michaeljaeger@...>
   > Description : 29P 2009 nov22 1.59 UT 4x210 sec 10"/3.8 Sigma 6303 field
90x60' M.Jäger
   >
   > You can access this file at the URL:
   >
http://groups.yahoo.com/group/Comet-Images/files/michael%20jaeger/29P20091122UT1\
59s4x210.jpg
   >
   > To learn more about file sharing for your group, please visit:
   >
http://help.yahoo.com/l/us/yahoo/groups/original/members/forms/general.htmlfiles
   >
   > Regards,
   >
   > schmidtcamera2500 <michaeljaeger@...>
   >





[Non-text portions of this message have been removed]

Hello,

This email message is a notification to let you know that
a file has been uploaded to the Files area of the Comet-Images
group.

   File        : /michael jaeger/2009Q420091122UT126s2x180.jpg
   Uploaded by : schmidtcamera2500 <michaeljaeger@...>
   Description : 2009 Q4  2009 Nov. 22  UT 1.26  2x 180 sec 10"/3.8  Sigma 6303  
M.Jäger

You can access this file at the URL:
http://groups.yahoo.com/group/Comet-Images/files/michael%20jaeger/2009Q420091122\
UT126s2x180.jpg

To learn more about file sharing for your group, please visit:
http://help.yahoo.com/l/us/yahoo/groups/original/members/forms/general.htmlfiles

Regards,

schmidtcamera2500 <michaeljaeger@...>

Hello Stu,

I see you haven't had an answer yet so I'll pop in. Welcome to the group!

Imaging comets and processing the images is very much like other faint, nebulous
targets. However, there is one very important difference: The comets are moving
with respect to the fixed star field. This means that if you expose for too
long, the comet will be blurred even if the stars are nice and round and not
trailed.

So you need to start out by determining the relative motion of the comet. Unless
you have SkyMap Pro or SkyTools 3, you need to visit
http://www.cfa.harvard.edu/iau/MPEph/MPEph.html
and enter the *exact name* of the comet in the box 1/3 the way down and click on
"Get ephemerides/HTML page". The site is very fussy about using the proper comet
name.

You will get a return telling you the relative motion of the comet in arc
seconds per minute. For example, take a look at Mike's fine image in
http://tech.groups.yahoo.com/group/Comet-Images/message/6194

It would be helpful to all of us if posters to the group would document their
images. Data like exposure time,  focal ratio and camera would help us. I don't
mean this to sound critical, as there is nothing wrong with just posting pretty
pictures. But it means that we can't learn much from these fine undocumented
images, and for beginners it is hard to break into the comet imaging business.

The "proper" name is C/2007 Q3. Entering that into the box we find that the sky
motion is 1.30 arc seconds per minute. You also get the RA/Dec settings for any
given day/time. You will need them if you are using a goto scope or setting
circles.

For my scope and camera, E-160 and SXV-H9, the image scale (binned 2x2) is 5 arc
seconds per pixel. I am willing to allow one pixel blur, so I would expose this
comet for a maximum of  (5 "/pixel)/(1.30 "/minute) = 3.9 minutes per pixel ~ 4
minute exposures.

I would stack the images manually (I use ImagesPlus) by clicking on the comet
head and translating all images so they line up on the head.

To decide what to image, visit
http://cometchasing.skyhound.com/
and
http://www.aerith.net/comet/weekly/current.html .

There you will find the comets ranked in terms of brightness and time to image
them.

What kind of equipment are you using?  Good luck with your imaging, and drop me
an email when you have questions.

Clear skies,

Dennis Persyk
Igloo (Now Roll-Off) Observatory Home Page http://dpersyk.home.att.net
Hampshire, IL
Pier Design http://home.att.net/~dpersyk/Pier_Design.htm


--- In Comet-Images@yahoogroups.com, "sforster12" <SHFORSTER1@...> wrote:
>
> I'm new to this group, and I would greatly appreciate it if one of you could
point me to a website/file that gives guidelines for successfully imaging
comets.
> Info re: exposure times as well as processing would be greatly appreciated.
>
> Thanks in advance.
>
> STU
>

Hi Michael,

your image is really very impressive, thanks for sharing it.

I am looking forward to our meeting next weekend and your comet show.

Greetings and clear skies
Bernd Häusler


-----Ursprüngliche Nachricht-----
Von: Comet-Images@yahoogroups.com [mailto:Comet-Images@yahoogroups.com]
Gesendet: Montag, 23. November 2009 22:43 in Rimpar
An: Comet-Images@yahoogroups.com
Betreff: [Comet-Images] New file uploaded to Comet-Images


Hello,

This email message is a notification to let you know that
a file has been uploaded to the Files area of the Comet-Images
group.

   File        : /michael jaeger/2009Q420091122UT126s2x180.jpg
   Uploaded by : schmidtcamera2500 <michaeljaeger@...>
   Description : 2009 Q4  2009 Nov. 22  UT 1.26  2x 180 sec 10"/3.8  Sigma
6303   M.Jäger

You can access this file at the URL:
http://groups.yahoo.com/group/Comet-Images/files/michael%20jaeger/2009Q42009
1122UT126s2x180.jpg

To learn more about file sharing for your group, please visit:
http://help.yahoo.com/l/us/yahoo/groups/original/members/forms/general.htmlf
iles

Regards,

schmidtcamera2500 <michaeljaeger@...>






------------------------------------

Yahoo! Groups Links

Dennis,

Thanks for the help.
Can I use a separate guide scope guiding on the comet head?

STU

--- In Comet-Images@yahoogroups.com, "dennis_persyk" <dpersyk@...> wrote:
>
> Hello Stu,
>
> I see you haven't had an answer yet so I'll pop in. Welcome to the group!
>
> Imaging comets and processing the images is very much like other faint,
nebulous targets. However, there is one very important difference: The comets
are moving with respect to the fixed star field. This means that if you expose
for too long, the comet will be blurred even if the stars are nice and round and
not trailed.
>
> So you need to start out by determining the relative motion of the comet.
Unless  you have SkyMap Pro or SkyTools 3, you need to visit
http://www.cfa.harvard.edu/iau/MPEph/MPEph.html
> and enter the *exact name* of the comet in the box 1/3 the way down and click
on "Get ephemerides/HTML page". The site is very fussy about using the proper
comet name.
>
> You will get a return telling you the relative motion of the comet in arc
seconds per minute. For example, take a look at Mike's fine image in
> http://tech.groups.yahoo.com/group/Comet-Images/message/6194
>
> It would be helpful to all of us if posters to the group would document their
images. Data like exposure time,  focal ratio and camera would help us. I don't
mean this to sound critical, as there is nothing wrong with just posting pretty
pictures. But it means that we can't learn much from these fine undocumented
images, and for beginners it is hard to break into the comet imaging business.
>
> The "proper" name is C/2007 Q3. Entering that into the box we find that the
sky motion is 1.30 arc seconds per minute. You also get the RA/Dec settings for
any given day/time. You will need them if you are using a goto scope or setting
circles.
>
> For my scope and camera, E-160 and SXV-H9, the image scale (binned 2x2) is 5
arc seconds per pixel. I am willing to allow one pixel blur, so I would expose
this comet for a maximum of  (5 "/pixel)/(1.30 "/minute) = 3.9 minutes per pixel
~ 4 minute exposures.
>
> I would stack the images manually (I use ImagesPlus) by clicking on the comet
head and translating all images so they line up on the head.
>
> To decide what to image, visit
> http://cometchasing.skyhound.com/
> and
> http://www.aerith.net/comet/weekly/current.html .
>
> There you will find the comets ranked in terms of brightness and time to image
them.
>
> What kind of equipment are you using?  Good luck with your imaging, and drop
me an email when you have questions.
>
> Clear skies,
>
> Dennis Persyk
> Igloo (Now Roll-Off) Observatory Home Page http://dpersyk.home.att.net
> Hampshire, IL
> Pier Design http://home.att.net/~dpersyk/Pier_Design.htm
>
>
> --- In Comet-Images@yahoogroups.com, "sforster12" <SHFORSTER1@> wrote:
> >
> > I'm new to this group, and I would greatly appreciate it if one of you could
point me to a website/file that gives guidelines for successfully imaging
comets.
> > Info re: exposure times as well as processing would be greatly appreciated.
> >
> > Thanks in advance.
> >
> > STU
> >
>

Certainly, that's possible, and that's what I do as I still shoot long exposures
on film.  But in practice you can run into problems with the comet's
diffuseness, or the comet could be moving through a field of stars bright enough
to "distract" an autoguider.  In these cases, I've resorted to manual guiding
while watching the image of the comet on a video display.

In other cases, the comet may be moving very slowly and so just autoguiding on a
nearby star would be fine.

Dave Kodama


--- In Comet-Images@yahoogroups.com, "sforster12" <SHFORSTER1@...> wrote:
>
> Dennis,
>
> Thanks for the help.
> Can I use a separate guide scope guiding on the comet head?
>
> STU
>
> --- In Comet-Images@yahoogroups.com, "dennis_persyk" <dpersyk@> wrote:
> >
> > Hello Stu,
> >
> > I see you haven't had an answer yet so I'll pop in. Welcome to the group!
> >
> > Imaging comets and processing the images is very much like other faint,
nebulous targets. However, there is one very important difference: The comets
are moving with respect to the fixed star field. This means that if you expose
for too long, the comet will be blurred even if the stars are nice and round and
not trailed.
> >
> > So you need to start out by determining the relative motion of the comet.
Unless  you have SkyMap Pro or SkyTools 3, you need to visit
http://www.cfa.harvard.edu/iau/MPEph/MPEph.html
> > and enter the *exact name* of the comet in the box 1/3 the way down and
click on "Get ephemerides/HTML page". The site is very fussy about using the
proper comet name.
> >
> > You will get a return telling you the relative motion of the comet in arc
seconds per minute. For example, take a look at Mike's fine image in
> > http://tech.groups.yahoo.com/group/Comet-Images/message/6194
> >
> > It would be helpful to all of us if posters to the group would document
their images. Data like exposure time,  focal ratio and camera would help us. I
don't mean this to sound critical, as there is nothing wrong with just posting
pretty pictures. But it means that we can't learn much from these fine
undocumented images, and for beginners it is hard to break into the comet
imaging business.
> >
> > The "proper" name is C/2007 Q3. Entering that into the box we find that the
sky motion is 1.30 arc seconds per minute. You also get the RA/Dec settings for
any given day/time. You will need them if you are using a goto scope or setting
circles.
> >
> > For my scope and camera, E-160 and SXV-H9, the image scale (binned 2x2) is 5
arc seconds per pixel. I am willing to allow one pixel blur, so I would expose
this comet for a maximum of  (5 "/pixel)/(1.30 "/minute) = 3.9 minutes per pixel
~ 4 minute exposures.
> >
> > I would stack the images manually (I use ImagesPlus) by clicking on the
comet head and translating all images so they line up on the head.
> >
> > To decide what to image, visit
> > http://cometchasing.skyhound.com/
> > and
> > http://www.aerith.net/comet/weekly/current.html .
> >
> > There you will find the comets ranked in terms of brightness and time to
image them.
> >
> > What kind of equipment are you using?  Good luck with your imaging, and drop
me an email when you have questions.
> >
> > Clear skies,
> >
> > Dennis Persyk
> > Igloo (Now Roll-Off) Observatory Home Page http://dpersyk.home.att.net
> > Hampshire, IL
> > Pier Design http://home.att.net/~dpersyk/Pier_Design.htm
> >
> >
> > --- In Comet-Images@yahoogroups.com, "sforster12" <SHFORSTER1@> wrote:
> > >
> > > I'm new to this group, and I would greatly appreciate it if one of you
could point me to a website/file that gives guidelines for successfully imaging
comets.
> > > Info re: exposure times as well as processing would be greatly
appreciated.
> > >
> > > Thanks in advance.
> > >
> > > STU
> > >
> >
>

This will be a springtime project, as my 120" of snow winter looms ahead.

STU

--- In Comet-Images@yahoogroups.com, "d_kodama" <kodama@...> wrote:
>
> Certainly, that's possible, and that's what I do as I still shoot long
exposures on film.  But in practice you can run into problems with the comet's
diffuseness, or the comet could be moving through a field of stars bright enough
to "distract" an autoguider.  In these cases, I've resorted to manual guiding
while watching the image of the comet on a video display.
>
> In other cases, the comet may be moving very slowly and so just autoguiding on
a nearby star would be fine.
>
> Dave Kodama
>
>
> --- In Comet-Images@yahoogroups.com, "sforster12" <SHFORSTER1@> wrote:
> >
> > Dennis,
> >
> > Thanks for the help.
> > Can I use a separate guide scope guiding on the comet head?
> >
> > STU
> >
> > --- In Comet-Images@yahoogroups.com, "dennis_persyk" <dpersyk@> wrote:
> > >
> > > Hello Stu,
> > >
> > > I see you haven't had an answer yet so I'll pop in. Welcome to the group!
> > >
> > > Imaging comets and processing the images is very much like other faint,
nebulous targets. However, there is one very important difference: The comets
are moving with respect to the fixed star field. This means that if you expose
for too long, the comet will be blurred even if the stars are nice and round and
not trailed.
> > >
> > > So you need to start out by determining the relative motion of the comet.
Unless  you have SkyMap Pro or SkyTools 3, you need to visit
http://www.cfa.harvard.edu/iau/MPEph/MPEph.html
> > > and enter the *exact name* of the comet in the box 1/3 the way down and
click on "Get ephemerides/HTML page". The site is very fussy about using the
proper comet name.
> > >
> > > You will get a return telling you the relative motion of the comet in arc
seconds per minute. For example, take a look at Mike's fine image in
> > > http://tech.groups.yahoo.com/group/Comet-Images/message/6194
> > >
> > > It would be helpful to all of us if posters to the group would document
their images. Data like exposure time,  focal ratio and camera would help us. I
don't mean this to sound critical, as there is nothing wrong with just posting
pretty pictures. But it means that we can't learn much from these fine
undocumented images, and for beginners it is hard to break into the comet
imaging business.
> > >
> > > The "proper" name is C/2007 Q3. Entering that into the box we find that
the sky motion is 1.30 arc seconds per minute. You also get the RA/Dec settings
for any given day/time. You will need them if you are using a goto scope or
setting circles.
> > >
> > > For my scope and camera, E-160 and SXV-H9, the image scale (binned 2x2) is
5 arc seconds per pixel. I am willing to allow one pixel blur, so I would expose
this comet for a maximum of  (5 "/pixel)/(1.30 "/minute) = 3.9 minutes per pixel
~ 4 minute exposures.
> > >
> > > I would stack the images manually (I use ImagesPlus) by clicking on the
comet head and translating all images so they line up on the head.
> > >
> > > To decide what to image, visit
> > > http://cometchasing.skyhound.com/
> > > and
> > > http://www.aerith.net/comet/weekly/current.html .
> > >
> > > There you will find the comets ranked in terms of brightness and time to
image them.
> > >
> > > What kind of equipment are you using?  Good luck with your imaging, and
drop me an email when you have questions.
> > >
> > > Clear skies,
> > >
> > > Dennis Persyk
> > > Igloo (Now Roll-Off) Observatory Home Page http://dpersyk.home.att.net
> > > Hampshire, IL
> > > Pier Design http://home.att.net/~dpersyk/Pier_Design.htm
> > >
> > >
> > > --- In Comet-Images@yahoogroups.com, "sforster12" <SHFORSTER1@> wrote:
> > > >
> > > > I'm new to this group, and I would greatly appreciate it if one of you
could point me to a website/file that gives guidelines for successfully imaging
comets.
> > > > Info re: exposure times as well as processing would be greatly
appreciated.
> > > >
> > > > Thanks in advance.
> > > >
> > > > STU
> > > >
> > >
> >
>

After all the wonderful images from the rendezvous with M88, here´s my humble
image from last night - the comet near M91:

http://www.kometarium.com/images/2007q3_2511_400mm.jpg

Regards
Burkhard Leitner

Hi Stu,

I've never had any luck guiding on a comet head, nor have I heard of any comet
imagers using guiding. I use MaximDL for guiding and no matter how I adjust the
parameters, the comet eventually runs into a star and the guide camera locks
onto the star.  If  you have a Paramount, you can program in the relative motion
so that the mount will follow the comet's trajectory. I don't know of anyone on
this list that had done that. I can supposedly do the same with my AP1200GTO,
but I've never been able to make it work.

Clear skies,

Dennis

--- In Comet-Images@yahoogroups.com, "sforster12" <SHFORSTER1@...> wrote:
>
> Dennis,
>
> Thanks for the help.
> Can I use a separate guide scope guiding on the comet head?
>
> STU
>

Dennis,

I've had pretty good luck with my SBIG STV.  And when it can't track reliably,
its display screen is a big help for manual tracking.

On the other topic, back in the 1990's a short paper was published on offsetting
your polar alignment so the tracking drift matched up with the comet's path.  I
never used the technique myself, but I thought that was a pretty clever
solution.

Dave


--- In Comet-Images@yahoogroups.com, "dennis_persyk" <dpersyk@...> wrote:
>
> Hi Stu,
>
> I've never had any luck guiding on a comet head, nor have I heard of any comet
imagers using guiding. I use MaximDL for guiding and no matter how I adjust the
parameters, the comet eventually runs into a star and the guide camera locks
onto the star.  If  you have a Paramount, you can program in the relative motion
so that the mount will follow the comet's trajectory. I don't know of anyone on
this list that had done that. I can supposedly do the same with my AP1200GTO,
but I've never been able to make it work.
>
> Clear skies,
>
> Dennis
>
> --- In Comet-Images@yahoogroups.com, "sforster12" <SHFORSTER1@> wrote:
> >
> > Dennis,
> >
> > Thanks for the help.
> > Can I use a separate guide scope guiding on the comet head?
> >
> > STU
> >
>

I've got an ST-237 and E-finder , so I can give it a try.

STU


--- In Comet-Images@yahoogroups.com, "d_kodama" <kodama@...> wrote:
>
> Dennis,
>
> I've had pretty good luck with my SBIG STV.  And when it can't track reliably,
its display screen is a big help for manual tracking.
>
> On the other topic, back in the 1990's a short paper was published on
offsetting your polar alignment so the tracking drift matched up with the
comet's path.  I never used the technique myself, but I thought that was a
pretty clever solution.
>
> Dave
>
>
> --- In Comet-Images@yahoogroups.com, "dennis_persyk" <dpersyk@> wrote:
> >
> > Hi Stu,
> >
> > I've never had any luck guiding on a comet head, nor have I heard of any
comet imagers using guiding. I use MaximDL for guiding and no matter how I
adjust the parameters, the comet eventually runs into a star and the guide
camera locks onto the star.  If  you have a Paramount, you can program in the
relative motion so that the mount will follow the comet's trajectory. I don't
know of anyone on this list that had done that. I can supposedly do the same
with my AP1200GTO, but I've never been able to make it work.
> >
> > Clear skies,
> >
> > Dennis
> >
> > --- In Comet-Images@yahoogroups.com, "sforster12" <SHFORSTER1@> wrote:
> > >
> > > Dennis,
> > >
> > > Thanks for the help.
> > > Can I use a separate guide scope guiding on the comet head?
> > >
> > > STU
> > >
> >
>